this thread is so old,
but i think this isn’t a proper way to do it.
if an invoice is created, there should be a way to create a credit memo with option to set manual refund in cash.
Right now, the credit memo is min 0.01 (adjustable with admin fee on credit memo to full amount - 0.01)
i think it would be good to have add “manual refund: [amount]”
admin fee: [amount]
balance credit memo: 0.00
then the invoice can be closed without having actual credit memo floating in the system
and also options to set returned quantity for each product ordered…
so it can be returned back to the stock…
anyone have any better comment?